400041400 has 48 divisors (see below), whose sum is σ = 1014656040. Its totient is φ = 145468800.

The previous prime is 400041353. The next prime is 400041449. The reversal of 400041400 is 4140004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88719 + ... + 93118.

Almost surely, 2^400041400 is an apocalyptic number.

400041400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400041400 is an abundant number, since it is smaller than the sum of its proper divisors (614614640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400041400 is a wasteful number, since it uses less digits than its factorization.

400041400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181864 (or 181855 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 400041400 is about 20001.0349732208. The cubic root of 400041400 is about 736.8317186685.

Adding to 400041400 its reverse (4140004), we get a palindrome (404181404).

The spelling of 400041400 in words is "four hundred million, forty-one thousand, four hundred".